package webmagic;/**
 * Created by Administrator on 2017/5/12.
 */

import us.codecraft.webmagic.Page;
import us.codecraft.webmagic.Site;
import us.codecraft.webmagic.Spider;
import us.codecraft.webmagic.processor.PageProcessor;

/**
 * @author caomin
 * @Date 2017-05-12 9:36
 * @Version 1.0
 */
public class MyProcessor implements PageProcessor {
    // 抓取网站的相关配置，包括编码、抓取间隔、重试次数等
    private Site site = Site.me().setRetryTimes(3).setSleepTime(100);
    private static int count =0;


    public Site getSite() {
        return site;
    }


    public void process(Page page) {
        //判断链接是否符合http://www.cnblogs.com/任意个数字字母-/p/7个数字.html格式
        if(!page.getUrl().regex("http://www.cnblogs.com/[a-z 0-9 -]+/p/[0-9]{7}.html").match()){
            //加入满足条件的链接
            page.addTargetRequests(
                    page.getHtml().xpath("//*[@id=\"post_list\"]/div/div[@class='post_item_body']/h3/a/@href").all());
        }else{
            //获取页面需要的内容
            System.out.println("抓取的内容："+
                    page.getHtml().xpath("//*[@id=\"Header1_HeaderTitle\"]/text()").get()
            );
            count ++;
        }
    }

    public static void main(String[] args) {
        long startTime, endTime;
        System.out.println("开始爬取...");
        startTime = System.currentTimeMillis();
        Spider.create(new MyProcessor()).addUrl("https://www.cnblogs.com/").thread(5).run();
        endTime = System.currentTimeMillis();
        System.out.println("爬取结束，耗时约" + ((endTime - startTime) / 1000) + "秒，抓取了"+count+"条记录");
    }
}
